ATS Nightfall renders the night side of the planet. NASA's VIIRS Black Marble city-lights composite, the 2016 annual composite, sits beneath a live day and night line, all three twilight bands, the points directly beneath the sun and the moon, and the current moon phase and illumination. A time scrubber moves the terminator a day either side of now, and a time-lapse mode sweeps it around the globe. Each twilight boundary is drawn as the geodesic circle it geometrically is, with sunset placed at the standard refraction-corrected altitude rather than at zero, so the shape of night is correct even at the equinoxes.